Concordance for stuttering in monozygotic and dizygotic twin pairs.

  title={Concordance for stuttering in monozygotic and dizygotic twin pairs.},
  author={P M Howie},
  journal={Journal of speech and hearing research},
  volume={24 3},
  • P M Howie
  • Published 1981 in Journal of speech and hearing research
The role of genetic factors in the etiology of stuttering was investigated in 30 pairs of same-sex twins, each pair containing at least one stutterer. Care was taken to ensure maximum accuracy in zygosity classification and objectivity in stuttering diagnosis. Zygosity classification was made independently of stuttering diagnosis. Pair-wise concordance for stuttering was significantly higher in identical twins (63%) than in fraternal same-sex twins (19%). The estimated risk of stuttering in the… CONTINUE READING

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